US4380455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkyl carbonates as phase separation inhibitors in liquid hydrocarbon fuel and ethanol mixtures
Assignee: Dow Chemical Co
•
Filing: 1982-03-01
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Granted: 1983-04-19
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Expires: 2002-03-01
Abstract
Abstract This invention is a method of preventing phase separation of hydrous ethanol and liquid hydrocarbon fuel mixtures comprising the addition of an effective amount of dialkyl carbonates.
Inventors
- 👤 Harry A. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:33
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/02; C10L1/023
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
43 words
A method for preventing a mixture of hydrous ethanol and a liquid hydrocarbon fuel from separating into two phases comprising adding to the mixture an effective amount of a phase separation inhibitor wherein the inhibitor is selected from the group of dialkyl carbonates.
Claim 2
Independent Claim
43 words
A method for preventing a mixture of hydrous ethanol and a liquid hydrocarbon fuel from separating into two phases comprising adding to the mixture an effective amount of a phase separation inhibitor wherein the inhibitor is selected from the group of dialkyl carbonates.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the amount of phase separation inhibitor added is between about 0.05 and 10.0 percent by weight of hydrocarbon fuel and hydrous ethanol mixture.
Claim 4
Dependent Claim
30 words
The method of claim 2 wherein the amount of phase separation inhibitor added is between about 0.1 and about 1.0 percent by weight of hydrocarbon fuel and hydrous ethanol mixture.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the phase separation inhibitor is dimethyl carbonate and diethyl carbonate.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein the phase separation inhibitor is dimethyl carbonate.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the liquid hydrocarbon fuel has utility as a fuel for an internal combustion engine.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein the liquid hydrocarbon fuel is gasoline.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein the phase separation inhibitor is effective above about 0° C.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein the phase separation inhibitor is effective above a temperature of about -20° C.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the phase separation inhibitor is effective above a temperature of about -40° C.
Claim 12
Dependent Claim
32 words
A gasohol composition in which phase separation is inhibited comprising gasohol having added thereto from about 0.05 to about 10.0 percent by weight of the gasohol, a dialkyl carbonate phase separation inhibitor.
Claim 13
Dependent Claim
32 words
A gasohol composition in which phase separation is inhibited comprising gasohol having added thereto from about 0.05 to about 10.0 percent by weight of the gasohol, a dialkyl carbonate phase separation inhibitor.
Claim 14
Dependent Claim
26 words
The composition of claim 11 wherein the amount of phase separation inhibitor added is from about 0.1 to about 1.0 percent by weight of the gasohol.
Claim 15
Dependent Claim
33 words
The composition of claim 11 or 12 wherein the gasohol comprises between about 80 percent and 99 percent by weight gasoline and between about 1 percent and 20 percent by weight hydrous ethanol.
Claim 16
Dependent Claim
23 words
The composition of claim 13 wherein the gasohol comprises about 90 percent by weight gasoline and about 10 percent by weight hydrous ethanol.
Claim 17
Dependent Claim
23 words
The composition of claim 14 wherein the hydrous ethanol comprises about 95 percent by weight ethanol and about 5 percent by weight water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |